C. T. Suddeth

Dakota Fire Hole (pit) used by the Dakota & Lakota Sioux when they lived on the Great Plains. A 12-16 inch fire hole was dug, with a second hole acting as an air shaft. This prevented causing fires during frequent high winds and was almost smokeless (very hot flames), helping to hide from enemies. Starting with the Vietnam War, the US military has taught recruits how to build these. https://www.wildernesscollege.com/dakota-fire-hole.html